Fabrication Of Highly Ordered 3D Carbon-based Polystyrene Composite Materials And Their Outstanding Conductivity

In this thesis, we focused on the fabrication of carbon-based polymer composite materials and the study about the electrical property of them. Based on heterocoagulation, polystyrene/carbon composite particles were prepared successfully, which were used to fabricate highly ordered 3D composite materials via "particle-constructing" method. The electrical property of the materials was also studied.The main contents of this thesis cover the following two aspects:(1)Fabrication of graphene-based polystyrene composite materials and their electrical conductivityBased on heterocoagulation, polystyrene/graphene composite particles were prepared successfully, which were used to fabricate highly ordered 3D composite materials via "particle-constructing" method. We developed a unique "particle-constructing" method for fabricating highly ordered 3D graphene-based polymer composite materials, throughout which the GNSs formed intact, uniform and well-defined network structure. The composite materials exhibited outstanding electrical properties involving extremely low percolation threshold and much higher conductivity. The method can be easily extended to fabricate highly ordered GNS aerogels and more GNS-based composite materials.(2) Fabrication of Multiwall carbon nanotube-based polystyrene composite materials and their electrical conductivity.Based on heterocoagulation, polystyrene/MWCNTs composite particles were prepared successfully, which were used to fabricate highly ordered 3D composite materials via "particle-constructing" method. The multiwall carbon nanotubes were treated with ultrasonic treatment to be dispersed in solvent as metastable state without any functionalization and then the thermodynamic effect is utilized as a unique driving force for coatings of MWCNTs on PS particles. PS/MWCNTs composite particles were used to fabricated PS-MWCNTs composite materials via "particle-constructing" method and carbon nanotubes formed intact, uniform and well-defined network structure in the materials, which made the composite materials exhibit excellent electrical conductivity.